Method and system for automatic bucket loading

Abstract

A method for controlling an automatic bucket control system during loading of a work implement of a work machine is disclosed. The method includes the steps of determining when the work implement engages a pile of material, initiating the automatic bucket control system in response to the work implement engaging the pile of material, determining a ground speed of the work machine, and generating a lift command based upon the ground speed. After fully engaging the material, the system may further adjust tilt commands and / or lift commands based upon a monitored crowd factor to control operation of the work implement.

Description

TECHNICAL FIELDThis invention relates generally to an automated bucket loading cycle for a digging operation and, more particularly, to a method and system for controlling the automated bucket loading cycle.BACKGROUNDWork machines, for example, wheel loaders, track loaders, and the like, having work implements, such as buckets, are often used to dig material from one location, and dump the material at one or more other locations. For example, wheel loaders having buckets are used to dig materials such as gravel, sand, soil, and the like, and dump the material into the bed of a truck, or at other sites.In a work environment in which the dig and dump process is performed repeatedly for long periods of time, it is desired to work as efficiently and productively as possible. However, as fatigue sets in, or if the operator is relatively inexperienced, the dig cycle may not be as productive as desired. This adversely impacts the efficiency of the work machine.As a result, attempts have be...

AI Technical Summary

Benefits of technology

The patent describes a method for controlling an automatic bucket control system on a work machine during loading. The method involves detecting when the work implement engages a pile of material, determining the speed of the work machine, and generating a lift command based on the speed. The method also includes monitoring a crowd factor and adjusting the tilt and lift commands based on the crowd factor to ensure safe and efficient loading. The technical effect of this patent is to provide a more automated and safe method for loading materials using an automatic control system on a work machine.

Problems solved by technology

However, as fatigue sets in, or if the operator is relatively inexperienced, the dig cycle may not be as productive as desired.

This adversely impacts the efficiency of the work machine.

For example, the ground may be wet or sandy, and thus not able to provide good traction.

Maintaining the engine at full speed may then cause the work machine to slip excessively as it enters the pile.

This may result in the bucket rising out of the pile without the automated dig cycle loading the bucket to capacity.

However, the known systems, including the system of the '153 patent, do not account for the engine speed at less than the full engine speed or the ground speed at less than the maximum ground speed for a given gear.

Furthermore, the known systems do not address the situation that arises when an operator downshifts when entering a pile, which may change engine speed, and consequently change the lift command.

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